package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.annotation.AutoFill;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.enumeration.OperationType;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import javax.security.auth.message.callback.PrivateKeyCallback;
import javax.xml.transform.Result;
import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 插入员工数据
     * @param employeeDTO
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {
        Employee employee  = new Employee();


        //因为employee和employeeDTO中对象的属性名都一样
        // 所以可以通过对象的属性拷贝快速地将dto中的数据转移到employee中
        BeanUtils.copyProperties(employeeDTO,employee);//顺序不要写反了 从前面的对象拷贝到后面的对象

        //设置状态 提前定义了常量类 方便后期维护
        employee.setStatus(StatusConstant.ENABLE);

        //新增员工统一设置默认密码123456并进行加密处理
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

//        //设置创建时间
//        employee.setCreateTime(LocalDateTime.now());
//
//        //设置修改时间
//        employee.setUpdateTime(LocalDateTime.now());
//
//        //设置当前属性创建人和更新人
//        employee.setUpdateUser(BaseContext.getCurrentId());
//        employee.setCreateUser(BaseContext.getCurrentId());

        employeeMapper.insert(employee);

    }


    /**
     * 员工分页查询
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {

        //用pagehelper 插件实现快捷的分页查询
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());

        Page<Employee> page = employeeMapper.pageQuery(employeePageQueryDTO);
        long total = page.getTotal();
        List<Employee> record = page.getResult();

        return new PageResult(total,record);
    }


    /**
     * 通过id修改员工的状态
     * @param id
     * @param status
     */
    @Override
    public void startOrStop(long id, Integer status) {
        //创建一个员工对象
//        Employee employee = new Employee();
//        employee.setId(id);
//        employee.setStatus(status);
//        employee.setUpdateTime(LocalDateTime.now());

        //可以用builder方法创建
        Employee employee = Employee.builder()
                .id(id)
                .status(status)
                .createTime(LocalDateTime.now())
                .build();
        employeeMapper.update(employee);
    }

    /**
     * 根据id查询员工信息
     * @param id
     * @return
     */
    @Override
    public Employee getById(long id) {
        Employee employee = employeeMapper.selectById(id);
        //将密码覆盖 即使是已经加密的密码 进一步提升安全性
        employee.setPassword("****");
        return employee;
    }

    /**
     * 编辑员工信息
     * @param employeeDTO
     */
    @Override
    public void update(EmployeeDTO employeeDTO) {
        //对象属性拷贝
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);

//        //设置修改时间
//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.update(employee);
    }

}
